Oil Sump Inspection - Lycoming TEO-540-C1A Maintenance Manual

F. While one person holds the oil sump, remove the 15 nuts, 15 lock washers, and 15 washers
from the left and right sides of the oil sump (Figure 8).
G. Remove the oil sump from the engine.
H. Remove and discard the oil sump gasket.
I. Examine all of the oil sump bolts that were to be kept separate when the oil sump was
removed. Make sure the bolts, studs, and nuts are not damaged are intact and have no
stripped threads. Replace any damaged or stripped fastener.
NOTICE: If studs are not already installed on the oil sump, install new studs in their
corresponding location per Figure 8.
Refer to the latest revision of the Service Table of Limits - SSP-1776 for the
minimum driving torque of the studs. Use a tool maker's square to complete a check
of the stud alignment.
There are different length bolts used to attach the oil sump to the crankcase, keep the
bolts separated to make sure the correct length bolt is installed in the correct
location.
J. Turn over or cover the oil sump to prevent dirt and debris from getting in the oil sump.

14. Oil Sump Inspection

A. Examine the oil sump for any raised metal on surfaces and for any scratch, ding, dent, or pit,
that exceeds 0.050 in. (1.27 mm) depth.
B. Replace the oil sump if there is any raised metal on surfaces or if a scratch, ding, dent, or pit,
that exceeds 0.050 in. (1.27 mm) depth is found on the sump.
C. Examine the oil sump baffle for cracks or distortion. If cracks are found replace the baffle and
Refer to the latest revision of the Service Table of Limits - SSP-1776 for the minimum
driving torque of the attaching bolts, and safety wire.
15. Oil Sump Installation
A. Clean the mating flange and interior of the oil
sump with mineral spirits.
B. Remove all gasket material on the flange. Make
sure the oil sump has no cracks or damage, is clean
and has no dirt, debris, or other foreign object
matter that could contaminate the oil supply for
the engine.
C. Remove (cut away) any excess accessory housing
gasket material that extends to the oil sump
mounting surface. Excess gasket material must not
extend between the accessory housing and
crankcase. The gasket must be flush with the oil
sump flange (Figure 9).
D. Remove, clean, and install the oil suction screen
per instructions in Chapter 12-10.
72-50
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TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
Remove Excess Accessory Housing
Gasket Material to Make It Flush with
the Oil Sump Flange
© 2018 Avco Corporation. All Rights Reserved
Figure 9
November 2018